flserial 0.6.0

Flutter Serial Port Plugin FFI based on great C library. Useful to communicate with RS232 devices.

0.6.0

Android support

• Added Android as a build target in hook/build.dart — native library now compiles via the Android NDK using the existing POSIX/termios code path
• Fixed build hook to use input.config.code.targetOS instead of Platform.is* — correctly identifies the target platform rather than the host, enabling cross-compilation for Android
• Added Android serial port scanner — probes known /dev/ paths (ttyUSB0–7, ttyACM0–7, ttyS0–3, ttyHS0–3, ttyMSM0–3, ttyGS0–3) instead of directory listing, which SELinux blocks on Android

Flow control

• Added flowControl parameter to SerialConfig (0 = none, 1 = RTS/CTS, 2 = XON/XOFF)
• Implemented hardware RTS/CTS flow control on Windows (DCB: fOutxCtsFlow, RTS_CONTROL_HANDSHAKE) and POSIX (CRTSCTS)
• Implemented software XON/XOFF flow control on Windows (fOutX/fInX, XonChar/XoffChar) and POSIX (IXON/IXOFF)
• Extended serial_open_ext() C function signature with flowControl parameter — updated in flserial.h, flserial.cpp, flserial_port_bindings.dart, and flserial.dart

Native library (C++)

• Refactored write() to be fully non-blocking — data is now queued and drained by a dedicated writeThread using a condition variable, preventing Dart from blocking on slow or flow-controlled ports
• Added writeLoop() — drain loop handles EAGAIN/EWOULDBLOCK on POSIX gracefully with a 1 ms back-off
• Set Windows write timeout to 2 seconds (WriteTotalTimeoutConstant = 2000) to prevent WriteFile from blocking indefinitely when flow control stalls the port
• Added std::queue, std::mutex, std::condition_variable for the write queue

Build hook

• Added early return when buildCodeAssets is false — avoids running the compiler for non-code asset invocations
• Added iOS as an alias for macOS build configuration

0.5.3

Dart layer

• Fixed critical race condition in dispose() — close() is now Future<void> and properly awaited before freeing native resources
• Fixed potential memory leak in write() — native buffer is now always freed via try/finally
• Fixed RangeError crash when receiving unknown event type from C++ — fromInt() now returns null for out-of-range values
• Removed unnecessary async from getModemStatus() — it was synchronous all along
• Improved native library load error message with platform context
• Fixed missing braces on single-statement if blocks in setDTR()/setRTS()

Native library (C++)

• Fixed incomplete termios configuration on POSIX — added cfmakeraw(), VMIN=0, VTIME=0 to prevent inherited terminal settings from corrupting communication
• Fixed data race on last_modem_status and send_port_id — both are now std::atomic
• Fixed partial write on POSIX — write() now loops until all bytes are sent
• Fixed missing guard in write(), set_dtr(), set_rts() when port is closed
• Expanded POSIX baud rate support: added 57600, 230400, 460800, 921600 (platform-conditional)
• Fixed redundant double close() call in serial_free() — destructor already handles it
• Added Windows COM port path fix — ports above COM9 now automatically use \\.\COMx prefix required by CreateFileA

0.5.2

• Add Dart C API

0.5.1

• Update readme

0.5.0

• Completely rewritten driver

0.3.5

• Add support 16KB Page Size

0.3.4

• Changelog fix

0.3.3

• Replace fifo library

0.3.2

• MacOS support
• Memory allocation fix

0.3.1

• Update libs

0.3.0

• Import project to new plugin ffi template
• Few Api changes

0.2.0

• New event model
• Cleaning up unnecessary libs
• Performance improvements
• Api changes, main functions:

Stream based events, before:

serial.onSerialData.subscribe(

to:

serial.onSerialData.stream.listen(

Write serial port, before:

serial.write(data.length, data);     

to:

serial.write(data);    

0.1.2

• Android compilation

0.1.1

• Initial beta version